Questions on the Nucleus
20 multiple choice questions on the Nucleus, with answers at the end.
Multiple Choice Questions: Nucleus
1. What is the main function of the nucleus?
A) Protein synthesis
B) Control center of the cell, storing genetic material
C) Energy production
D) Digesting waste
2. The genetic material inside the nucleus is called:
A) RNA
B) DNA
C) Protein
D) Lipids
3. What surrounds the nucleus and controls what enters and leaves it?
A) Cell membrane
B) Nuclear membrane (or nuclear envelope)
C) Cytoplasm
D) Endoplasmic reticulum
4. Which structure inside the nucleus produces ribosomes?
A) Chromatin
B) Nucleolus
C) Golgi apparatus
D) Lysosome
5. The DNA in the nucleus is organized into structures called:
A) Chromosomes
B) Ribosomes
C) Proteins
D) Vesicles
6. The fluid inside the nucleus is called:
A) Cytoplasm
B) Nucleoplasm
C) Matrix
D) Riboplasm
7. The pores on the nuclear membrane allow:
A) Movement of DNA out of the nucleus
B) Movement of molecules such as RNA and proteins in and out
C) Water to enter the nucleus
D) Lipids to leave the nucleus
8. Which process takes place in the nucleus?
A) Protein synthesis
B) Cellular respiration
C) DNA replication and transcription
D) Photosynthesis
9. Chromatin is composed of:
A) DNA and proteins
B) RNA only
C) Lipids and carbohydrates
D) Proteins only
10. During cell division, chromatin condenses to form:
A) Chromosomes
B) Ribosomes
C) Mitochondria
D) Lysosomes
11. The nucleus is usually:
A) Found only in animal cells
B) Found in both plant and animal cells
C) Found only in prokaryotes
D) Absent in all cells
12. Which molecule carries genetic information from the nucleus to the cytoplasm?
A) DNA
B) mRNA
C) tRNA
D) ATP
13. Which part of the nucleus is involved in assembling ribosomal RNA?
A) Chromatin
B) Nucleolus
C) Nuclear pore
D) Nuclear membrane
14. The nuclear membrane is made up of:
A) A single lipid layer
B) A double lipid bilayer
C) Protein only
D) Carbohydrates only
15. Which of the following is NOT a function of the nucleus?
A) Regulating gene expression
B) Storing genetic material
C) Producing ATP
D) Controlling cell activities
16. Nuclear pores are important because they:
A) Allow large molecules to pass freely
B) Regulate transport of molecules between nucleus and cytoplasm
C) Prevent any molecules from passing
D) Only allow water to pass
17. The nucleus contains _____ which condenses into chromosomes during cell division.
A) Ribosomes
B) Chromatin
C) Cytoplasm
D) Lysosomes
18. The nucleolus is visible under a microscope because it:
A) Is very large
B) Is dense and stains darkly
C) Contains many mitochondria
D) Has a membrane around it
19. In prokaryotic cells, the genetic material is located:
A) Inside a nucleus
B) In the cytoplasm, not enclosed by a membrane
C) Inside mitochondria
D) In chloroplasts
20. Which process is NOT directly controlled by the nucleus?
A) DNA replication
B) Transcription
C) Translation
D) Cell division
Answer Key
1. B) Control center of the cell, storing genetic material
2. B) DNA
3. B) Nuclear membrane (or nuclear envelope)
4. B) Nucleolus
5. A) Chromosomes
6. B) Nucleoplasm
7. B) Movement of molecules such as RNA and proteins in and out
8. C) DNA replication and transcription
9. A) DNA and proteins
10. A) Chromosomes
11. B) Found in both plant and animal cells
12. B) mRNA
13. B) Nucleolus
14. B) A double lipid bilayer
15. C) Producing ATP
16. B) Regulate transport of molecules between nucleus and cytoplasm
17. B) Chromatin
18. B) Is dense and stains darkly
19. B) In the cytoplasm, not enclosed by a membrane
20. C) Translation
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